5:23ה׳:כ״ג
1 א

לְפוּם צַעֲרָא אַגְרָא. כְּפִי רֹב הַצַּעַר שֶׁאַתָּה סוֹבֵל בְּלִמּוּד הַתּוֹרָה וַעֲשִׂיַּת הַמִּצְוָה, יִהְיֶה שְׂכָרְךָ מְרֻבֶּה:

"According to the pain is the reward": According to the greatness of the pain, that you endure in the study of Torah and in the performance of the commandments, will your reward be great.